8T49N241-004NLGI

Overview

The Renesas 8T49N241-004NLGI is a FemtoClock NG Universal Frequency Translator featuring one fractional-feedback PLL and three fractional output dividers. It generates up to four independent LVPECL, LVDS, HCSL, or LVCMOS outputs ranging from 8kHz to 1.0GHz (differential) or 250MHz (LVCMOS). The device supports jitter attenuation for 10G to 25G Ethernet applications with 0.35ps RMS jitter (12kHz–20MHz). It accepts two differential input clocks (8kHz–875MHz) and an internal crystal oscillator, configurable via I²C or external EEPROM.

Feature Summary

• Generates up to four independent output frequencies from 8kHz to 1.0GHz using one PLL and three fractional dividers
• Supports LVPECL, LVDS, HCSL, and LVCMOS output levels with 0.35ps RMS jitter performance
• Accepts dual differential inputs (LVPECL, LVDS, LVHSTL, HCSL, LVCMOS) with hitless switching capabilities
• Configurable via I²C interface or boot from external I²C EEPROM

Applications

• 10G/40G/100G SONET/SDH and Ethernet network line cards
• Wireless base station baseband units
• GbE/10GbE/100GbE Synchronous Ethernet line card applications
• Carrier Ethernet switches and OTN equipment

Procurement Notes

Verify the specific suffix '004' against official Renesas documentation to confirm factory pre-programmed configuration parameters. Confirm current availability status as this component family may be subject to lifecycle changes or replacement by newer series such as the 8T49N242.

Selection Notes

Select this model when four independent output frequencies are required from a single clock source. Ensure the application requires the specific jitter attenuation profile of 0.35ps RMS. Verify that the system power supply matches the 2.5V or 3.3V core voltage requirements and that the I²C address configuration fits the bus topology.

Part Context

This part belongs to the FemtoClock NG Universal Frequency Translator family, designed for high-performance timing in networking and communication systems. It integrates low-phase noise frequency translation and synthesizer functions suitable for strict jitter limits in high-speed serial data applications.

Replacement Considerations

Publicly listed similar replacements include the 8T49N241-998NLGI8 and 8T49N242-998NLGI8. Verify pinout compatibility and register settings before substitution.